GIMP Exercise Submission

Points 5 Submitting a text entry box or a file uploadRead GIMP Exercise Instructions first.Submit your GIMP exercise files here.RubricGIMP ExerciseGIMP ExerciseCriteriaRatingsPtsThis criterion is linked to a Learning OutcomeImage cropImages are cropped correctly1 ptsThis criterion is linked to a Learning OutcomeImage rotateImages are rotated correctly1 ptsThis criterion is linked to a Learning OutcomeAccess Image SpecificationsAccess image meets the given specifications (pixel array, resolution, and file format).1 ptsThis criterion is linked to a Learning OutcomeThumbnail Image SpecificationThumbnail image meets the given specifications (pixel array, resolution, and file format).1 ptsThis criterion is linked to a Learning OutcomeFile namesFiles are named correctly.1 ptsTotal Points: 5Glossary of Digital ImagingScanning and Digital Imaging Bit depth (1-bit, 8-bit, 24-bit)The amount of information (black and white or color) a computer can discern for each bit of an image. 1-bit is black and white (off or on), 8-bit is 256 “shades”, “values” or “levels” of gray or 256 colors, 24-bit is millions of colors. Crop To select out an area of an image.Once an image is cropped, save the cropped version with a different name, retaining the original image.Digital imageA computer file which, when used in conjunction with the proper software, will display a picture on the computer screen or print out to a digital device such as a laser printer.DownloadTo “get” a file; to move a file electronically from one place (such as a Web page or server) to your machine (such as onto your hard drive or floppy disk).DownsizeTo reduce the file size of an image, by lowering the resolution and/or reducing the square measurement of the file.Dpi (dots per inch)Measure of resolution for a laser printer. See also: Ppi (pixels per inch)File formatThe specific way digital information is made and stored by the computer. Not all software applications can read and/or manipulate all file formats. (See: GIF, JPEG, TIFF.)GIF (Graphics Interchange Format)A common graphic file format on the World Wide Web; used by online services and Web browsing software, GIFs contain information compressed into a relatively small file size and may display faster than other formats.GIMPAn open-source software, which allows manipulation and editing (enhancing, resizing, cropping, etc.) of digital images.GrayscaleA system of displaying images in gray tones (or “levels of gray”), simulating the continuous gray tones of a photograph. To achieve grayscale, a monitor must be able to display 2 to 16 bits of information per pixel. This allows the monitor to display a black or white pixel as well as several values between black and white.Image file sizeThe amount of computer storage space a file requires; usually measured in kilobytes (K) or megabytes (M, MB, mgs or “megs”). An image file that is 5 x 7 inches, 8-bit gray (as in a black and white photo), resolution 300dpi, is 3M in size. (A floppy disk holds 1.3M.)Image sizeThe physical dimensions of the image as measured in the small squares (pixels) of a computer screen; an image filling a “typical” computer screen (13 inch diagonal) would be 640 x 480 pixels; compare to image file size above.JPEG (Joint Photographic Experts group)Pronounced “JAY-peg”, a graphic file format that compresses information about many colors (up to 16 million) in the image into a smaller file.“Manipulate the image”Change the image electronically in some way—resize, change the resolution, remove color, sharpen, clean up, edit, convert the file format, etc.Output resolutionThe detail and clarity (achieved by closeness of dots) with which the image will be displayed or printed (dependent on the capability of the display or printing device).PPI (pixels per inch)Measure of resolution for a monitor. See also: Dpi (dots per inch)ResizeTo change the size of an image by reducing or increasing the resolution and/or the square measurement of the file. [Note: it is not possible to add more data to an image after it is scanned. It is always preferable to scan an image at the size needed rather than to try to increase the size or resolution later.]ResolutionAn expression of image size; the sharpness and clarity of an image, achieved by the closeness of the dots that make up the image. Resolution is expressed for the scanner as samples per inch (spi), for the screen as pixels per inch (ppi), for the printer as dots per inch (dpi). Most people say “dots per inch” when speaking of scanning resolution, (although technically this is not accurate). The more data per inch (samples, pixels, dots) the higher the resolution of the image and the better looking the image will be. Most screens display at a resolution of 72 pixels per inch. Most laser printers print at 300 or 600 dpi. Higher resolution image files are much larger than low resolution image files, so only save a high resolution image if you need to (such as for archiving). You will need a high resolution image if you are going to print the image in a paper publication and/or enlarge all or any part of the image on screen or on paper.ScannerA device that takes a picture of an image, breaks it down into dots and records it as a digital file for use with a computer. Some types of scanners are: • flatbed scanner: A device for converting paper images (photographs, drawings, printed images) into computer graphic files. • slide scanner: A device for converting 35mm slides into computer graphic files.TIFF (Tagged Image File Format)A type of graphic file format developed for scanning. TIFFs are bitmapped graphics that can contain lots of information about each bit or pixel. TIFFs can be read by both Macintosh and PC/Windows applications, such as PageMaker and QuarkXpress. If you think you will ever print your image in a book or publication of any kind, you will want to save a copy of your image as a TIFF. Because TIFFs save a lot of information about each pixel, they can be very large files.GIMP Exercise InstructionsInstructionsFor this exercise, you will create 1) one access image and 2) one thumbnail image by manipulating (i.e., cropping, rotating, reseizing and converting to different formats) a given image file – a postcard purchased in New Mexico was scanned in at 300 dpi; then it was saved as TIFF (NewMexico.tiff 12.8 MB).Download and install the GNU Image Manipulation Program (Links to an external site.) (GIMP), an open-source image editing programUse the program’s crop tool to trim away unwanted portions of the image, rotate the image clockwise – per the tutorial below, then create two files – access file and thumbnail file.Create two derivative images based on the following derivative image requirementName your files as per the following file name convention.Derivative Image Requirement File FormatPixel Array ResolutionAccess ImageJPEG1000 pixels across the long dimension 200 ppiThumbnail ImageGIF150-200 pixels across the long dimension 72 ppiFile naming conventionFile nameExampleAccess ImageNewMexico_fs_yourlastnameNewMexico_fs_Kim.jpgThumbnail ImageNewMexico_tn_yourlastnameNewMexico_tn_Kim.gifResources for GIMP ExerciseOur GIMP Exercise Tutorial Download GIMP Exercise Tutorialand Online Session will walk you through all of the steps of creating the derivative image files. You can also take a look at the tutorials at GIMP (Links to an external site.)and/or in Lynda (Links to an external site.) for further learningGradesYour GIMP Exercise counts as 5 points. Late submission: Your GIMP Exercise files received after the due date will incur a 1-point deduction penalty for each day late unless there are extenuating circumstances.2) also short comment to a student Discussion


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